Modeling of machine failures in a flexible manufacturing cell with two machines served by a robot

Reliability Modeling and Analysis of Flexible Manufacturing Cells

“…Unreliable FMC system performance results obtained from the stochastic model presented in this paper are compared to the reliable FMC system performance results, whose model is reported elsewhere in Savsar and Aldaihani (2004) and Aldaihani and Savsar (2005a). Figure 12 shows the production output results for both the reliable and unreliable FMC system for a pallet capacity of n=4 units at different pallet transfer rates.…”

“…Therefore, it is preferable to have a closed form solution for the state probabilities, as well as system performance measures for applications of the model in system design and analysis. Savsar and Aldaihani (2008) have obtained a closed form solution for this problem, which involved sophisticated algebraic analysis and manipulations. In the following section, we present the results obtained for the closed form solution.…”

“…Aldaihani and Savsar (2005a) and Savsar (2008) presented a stochastic model and numerical solutions for a reliable FMC with two machines served by a single robot. Savsar and Aldaihani (2004) and Savsar and Aldaihani (2008) have developed stochastic models for unreliable FMC systems with two unreliable machines served by a robot and a pallet system. Aldaihani and Savsar (2005b) and Aldaihani and Savsar (2008) have presented stochastic models and numerical solutions for performance analysis of an unreliable FMC with two unreliable machines served by two robots and a pallet.…”

Petri net based decision system modeling in real-time scheduling and control of flexible automotive manufacturing systems

“…The paper of ElSayed, Younis, and Magdi (1989) focuses on the loading problem in FMS with variable production ratios. Savsar and Aldaihani (2008) developed a simulation model to investigate the FMS performance while minimizing the workload unbalance. In this study, a stochastic model is developed to analyze performance measures of a flexible manufacturing cell (FMC) under different operational conditions, including machine failures and repairs.…”

A Simulation Study on the Application of Cellular Manufacturing System in the Automated Welding Line Producing Excavator-parts

“…FMC를 대상으로 하는 연구들의 많은 부분은 일정계 획(Scheduling)에 대한 연구들인데 복수의 장비와 물류를 담당하는 로봇이 원형으로 구성되었을 때 일정계획을 수 립하는 문제와 [4,10] 직선형 FMS의 일정계획을 다룬 연구 들이 [3,5] 발표된 바 있다. Lu와 Wiens [6] 은 시뮬레이션을 이용하여 U형 FMC의 효과에 대해 검증한 논문을 발표하 였으며, Savsar와 Aldaihani [8] 는 FMC를 신뢰성 측면에 서 분석한 연구결과를 발표하였다.…”